Self threading shuttle



April 19, 1932. J. G. GRIESER lltl il il "flu W/T/VESS JNVENTOR.

GL/NTo/v S. Coal/EN. .J2SE/2H G. Ge/ESEB.

A TTORNEY.

Patented Apr. 19, 1932 UNITED STATES PATENT OFFICE JosEyH GEORGE GEIEsEn, E scnANToN, PENNSYLVANIA, AssIGNoE To DEAPEE. con- PoRATIoN, oF norEnALE, MASSACHUSETTS, A CORPORATION 0E MAINE sELE THREADING SHUTTLE Application filed October 6, 1931. Serial No. 567,221.

This invention relates to shuttles for looms, and more particularly to a self contained tension means in the threading block of an automatically threading shuttle for properly tensioning the filling as it passes from the" Fig. 2 is a cross sectional view taken substantially on line 22 of Fig. 1, and

Fig. 3 is a bottomI plan view of the threading block showing the arrangement of the tension device therein. 2 A shuttle 1 of suitable conventional form is provided with any usual means, such as bobbin 2, for holding a supply of filling. The filling passes from the bobb-in through a threading block 3 and out through a side eye f1. The threading block may be provided with any usual form of slot and ledges to permit the filling to be automatically drawn into the proper passage, and out through the side eye, when the shuttle is picked across the loom.

In shuttles of this type it is necessary to provide so-me means for applying a uniform tension of the proper degree to the filling before it passes through the side eye. The novel tension herein illustrated is positioned at the mouth 5 of the longitudinally extending thread conducting slot 6 in order that the tension may be applied before the filling enters the more or less tortuous path that it follows through thethreading block. The tension device consists essentially of a pair of vertically positioned, laterally opposed tension members herein shown as being comprised of cylindrical posts 7 and 8 located in apertures 9 and 10, Which extend Vcrosswise of the threading slot from the bottom of the block and terminating just above the tops of the posts. The aperture 9, it will be noted, is substantially cylindrical in form, While the aperture 10 is elongated transversely of its axis, and the tWo apertures are connected as aty 11 below the threading slot by a restricted vbut prevents their becoming laterally displaced.` A coil spring 12 is positioned in a recess 13 in the Wall of the threading block on the same side as the post 8. This coil spring extends from the recessf tothe post 8 and serves to yieldingly retain the posts in contact With each other. It is to be understood that considering my invention from its broader aspects, the exact mode of retaining the coil spring in the block is not of particular importance, the essential feature being that the spring is entirely supported by the block so that the block and tension become a unit.

Suitable releasable means, herein shown as a Wire pin 14, is provided for retaining the posts in their respective apertures. This pin extends through openings 15 in the opposite Walls of the threading block and across the apertures 9 and 10beloW the bottom 0f the tension posts 7 and 8. When the threading block is positioned in its recess 16 Vin the Wood of the shuttle, the pin 14 cannot drop out of the bloclr. Hovveven'when the block is removed from the shuttle by removing the Y usual bolt 17, the pin 14 can readily be released to permit removal of the posts 7 and 8 for replacement of the posts or the spring.

It will thus be seen that I have provided a simple and etiicient tension Which may be readily assembled into a unit with the threading block.

It is to be understood that the embodiment of my invention herein illustrated and described is for purposes of illustration only, and not of limitation, as the construction disclosed may be departed from in many re-L spects Without departing from the spirit of the invention.

I claim:

1. A shuttle including a threading bloc y having a longitudinally extending thread conducting slot and a spring `clamp tension comprised of a pair of laterally opposed posts v vertically mounted in apertures extending upwardly from the bottom of the threading block one at each side of the slot, said aper- .2o .block to one of the Yposts to yieldingly urge y Y l1,854,989

extending transversely of the lower ends of.

the apertures below the posts.

2. A shuttle including 'a threading block `having a.Y longitudinally extending thread Conducting lslot and a spring` clamp tension l y positioned at the mouth of the slot and com- Y prised of a pair of laterally'opposed cylindrical posts vertically mounted in apertures i extending upwardly from the bottom ofthe threading block and communicating laterally A with the slot, .there being a restricted opening between the-apertures below the slotto permit Contact of the posts, a spring extending from a recess in one wall of thethreading .thevposts together and a pin extending across the lower end of the apertures below the posts.

JOSEPH GEORGE GRIESER.` 

